Hi I got some Nitric acid and was using it instead of Phosporic for lowering my Ph as my tap water is quite hard at around 7.5- 8 Ph. I thought Nitric acid is just more concentrated and would mean using less than Phosphoric but it seems I use the same amount to get the desired Ph. When I read through some of the post here, I get mixed impressions and some people would only use Nitric acid during veg period and then use phosphoric during flower period. Is this right? I've been having a lot of st